/Engine/Source/Runtime/Engine/Public/Rendering/SkeletalMeshVertexBuffer.h
16 bit UV version of skeletal mesh vertex make sure to update GpuSkinCacheCommon.usf if the member sizes/order change!
template<uint32 InNumTexCoords> struct TGPUSkinVertexFloat16Uvs : public [TGPUSkinVertexBase](API\Runtime\Engine\Rendering\TGPUSkinVertexBase)
FVector3f
Position
Full float position
FVector2DHalf[N...
UVs
Half float UVs